Listen there is no easy way to beat sephiroth. I beat him at level 75 with Ultima Weapon with all my drives maxed out. Keep in mind that he is immune to all magic except for reflecga. His starting attack is called flash. It is almost unavoidable except by reaction guard or by gliding the hell to the other side of the battlefield. He also has some really devastating combo attacks. If he knocks you into the air you will take some really massive damage if you don't have the abilities "retaliating slash" and " aerial recovery". Even then you can still get really hurt up there. Stay out of the air as much as possible and you have a better chance of winning. All the growth abilities maxed out are pretty much neccessary. I found myself using Quick Run a hellava lot in this fight. He also has the 15 Flame Pillars attack like in KH1. If he flies into the air and starts chanting YOU HAVE TO ATTACK HIM IMMEDIATLEY or you most likely will get majorly pwned. It is called Sin Heartless Angel and it reduces your HP to 1 and your MP to 0. Make sure you have Elixers, Curaga, and Reflecga on your shortcuts. He has this dark balls ability that sends these big dark hole things after you I normally just used Reflecga to make them dissappear. He has one last attack I really hate it is fricken meteor. I'm sure youv'e used it in final fantasys but it really sucks on them. In this one it is damn hard to avoid on this. He flies off the frickin map and starts shooting small meteors at you but thankfully there's no big meteor at the end. Just glide like crazy and you'll avoid most of them. You really need the ability "Leaf Bracer" for this battle. That at least lets you use Curaga in peace. In round 1 he's pretty calm and the worst he does is Sin Heartless Angel so just combo then glide or quick run away do that alot and you'll go into round 2. In round 2 he is kinda ****ed at you and he will introduce you to 15 Flame Pillars. It sucks you in on this one so glide or quick run away when he says something and jumps back. He is also really fast now so be careful. I also forgot to mention the "Black Feather Teleport" at least thats what I call it. I'm sure you saw it well get used to it. Use the strategy above and you might survive. Now then in round 3 he is REALLY REALLY FAST now so you will have trouble hitting him. He is REALLY ****ED NOW so he will hit you harder with longer combos he has his whole arsenal here so don't hold back on this guy. If you beat him head to town and talk to cloud then head back and sit and enjoy. You'll get the Fenir keyblade for your troubles I suggest you equip it to Final Form. Congrats you beat the 2nd toughest fight in the game that's right 2nd the semi final match of the hades paradox cup is the toughest. Let me put it this way you will hate the final fantasy characters in this game afterwards but don't worry sephiroth isn't in it but the others except Aerith are in it against YOU when you DON'T HAVE SUMMONS OR DRIVE OR PARTY MEMBERS!!!

ok beat him in lvl 65 with ultima,no glide and doge jump i only used the ability berserk!!!!!!!

They are:Beat AtlanticaBeat 100 Acre WoodsBeat Goddess of Fate (or Destiny) CupChest in 'The World that Never was'-'Brink of DespairChest in 'Space Paranoids' right before you fight the MCPChest in 'Twilight Town'-'Sunset Station'Collect all 50 Materials.

You then have to get an 'Energy Crystal which can be found somewhere by fighting heartless in 'Space Paranoids.'